Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 Puzzles and Games » swap last and first digit » 2013-07-23 10:31:09

Replies: 7

Today my friend asked me a question.I couldn't find answer and i am not sure that there is a correct one. But he says there is.

Find a number that if you swap first and last digit you will get two times bigger number (example: 2*abcdef=fbcdea)

Do you have any idea?

-number is 18 digit
-first digit is even number
-last digit is odd number
-only one of digits is zero

Board footer

Powered by FluxBB